Skip to main content

Fuel Jettison

Fuel Jettison:


What is fuel Jettison ?

 A jettison system is provided to avoid the necessity for heavy maintenance tasks, by providing a means to minimise the potential for an overweight landing. (The system is not required for certification reasons relating

to the performance of the aircraft). The system is activated by means of two dedicated pushbuttons ‘Arm’ and ‘Active’ located on the cockpit overhead panel. The system can be manually stopped by de-selection of

either of these pushbuttons, or automatically if all jettison/transfer pumps are running dry (low pressure) or when the fuel quantity drops below a predetermined target input by the flight crew.


Why is this Required ?

Landing at weights above the maximum design landing weight reduces the normal performance margins.

An overweight landing with an engine inoperative or a system failure may be less desirable than landing below maximum landing weight.

Fuel jettisoned above 5,000 to 6,000 feet will completely vaporize before reaching the ground. Therefore, general recommendation is to jettison fuel above 5,000 to 6,000 feet whenever possible, although there is no restriction on jettisoning at lower altitudes if considered necessary by the flight crew.



Labels:

Comments

Post a Comment

Popular posts from this blog

Aircraft Nose Cone

Why the Nose Cone in Aircraft is Important ?   Nose cone is also known as RADOME. As the Name Implies, it is the DOME which consists of Radar Equipment. The function of the radome is to protect the antennas installed in the nose of the aircraft from airflow, rain, hail, lightning strike, bird strike,etc. At the same time it must provide a radio-frequency transparent window, suitable for the microwave signals of the weather detection radar, instrument landing system and microwave landing system. The most demanding system in terms of radome radio frequency specification is the weather radar.   Nose Cone/Radome Sources of radome degradation   There are many reasons for the performance level of a radome to degrade below minimum requirements. They range from lightning strike, bird strike, natural erosion, water ingress for some types of radomes, ageing, poor, repairs such as wrong material used, or over-painting.   How a degraded radome affects t...
Post a Comment
Read more

737 Max Recertification Process

As we all know the Recertification flight test for 737 max completed on 1-July-20. This is 737-7 Aircraft. As per the FAA below are the list of process further required to ungrounding of the Aircraft. But this is applicable only to US, each country's regulator has to approve it to make sure Max is flying safe only then it is allowed in their Airspace. The remaining tasks include: JOEB Validation & FSB Review  – The FAA’s Flight Standardization Board (FSB) and the Joint Operations Evaluation Board (JOEB) which includes international partners from Canada, Europe, and Brazil will evaluate minimum pilot training requirements.  The FSB will issue a draft report for public comment addressing the findings of the FSB and JOEB. Final FSB Report  – The FAA will publish a final FSB report after reviewing and addressing public comments. Final Design Documentation and TAB Report  – The FAA will review Boeing’s final design documentation in order to evaluate compliance with al...
Post a Comment
Read more

Weather Radar

What is Airborne Weather Radar ? Is it required ? Airborne weather radar is a type of radar used to provide an indication to pilots of the intensity of convective weather. Modern weather radars are mostly doppler radars, capable of detecting the motion of rain droplets in addition to intensity of the precipitation. Typically, the radar antenna is located in the nose of the aircraft. Signals from the antenna are processed by a computer and presented on a screen which may be viewed by the pilots. Droplet size is a good indicator of strong updrafts within cumulonimbus clouds, and associated turbulence, and is indicated on the screen by patterns, color coded for intensity. Some airborne weather radar systems may also be able to predict the presence of wind shear. Weather Radar   Is it required to be installed in Aircraft?   As per FAA and aviation regulators worldwide, all operators shall not operate unless it is equipped with airborne weather r...
Post a Comment
Read more